This have anyone actually tried this?
No. It looks likea waste of time.
How realistic is this programme?
It's a program. But it doesn't seem useful.
It somehow sends fake information to the mining pool on the amount of hashes it actually has and squat on the same network as other Bitcoin miners and take a share too..
Mining pools don't ask miners how many hashes they have. They just give some work, and then wait for the participant to complete the work. You prove that you've completed the work by submitting a valid nonce for the work given. It isn't possible to find a valid nonce without generating the actual hashes.